The phrase "a much more influential" is correct and usable in written English.
It can be used when comparing the level of influence of one thing over another, emphasizing a significant difference in influence.
Example: "In the realm of social media, influencers can be a much more influential force than traditional advertising."
Alternatives: "far more impactful" or "significantly more powerful".
He'd be a much more influential guitarist if anyone else could keep up with him.
Last week, Mohamed El-Erian, the C.E.O. of the bond giant Pimco, sent a letter to investors saying that "the new normal" is a world in which "the public sector plays a much more influential role".
She taps into a hunger for a more collaborative, participatory type of democracy in which parties are not the focus of most activity and civil society plays a much more influential role.
Januzaj's move to the Bundesliga comes only two weeks after Van Gaal backed him to have a much more influential role at Old Trafford this season, the Belgium international having fallen out of favour since David Moyes's sacking from the club.
Last week, Mohamed El-Erian, the C.E.O. of the bond giant Pimco, sent a letter to investors saying that "the new normal" is a world in which "the public sector plays a much more influential role". That's a more uncertain world and therefore one in which markets will be more volatile.
With Republicans controlling both chambers of Congress and the presidency, however, the head of the DNC will play a much more influential role in Democratic politics.
While it is true that various elements of Vedic ritual survive in modern practice and thereby serve a unifying function, much more influential commonalities appear in the worship of icons or images (pratima, murti, or archa).
To a smaller but much more influential cohort — one that includes many of Virginia's power players — Dragas has proved herself to be someone willing to bravely take on the entrenched state university and stand firm in her beliefs.
Over the last quarter century it has ballooned into a much larger and much more influential organization than anyone might have imagined in 1977.
The release of "12 Zodiacs" is similar to DRM-free download experiments by Radiohead and Louis CK, but with a difference: Wang is much more influential.
A victorious Russia would become much more influential within the EU and pose a potent threat to the Baltic states with large ethnic Russian populations".
